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A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
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In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
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Updated: May 9, 2025

Identification and Quantification of Decomposition Mechanisms in Lithium-Ion Batteries; Input to Heat Flow Simulation for Modeling Thermal Runaway
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Decoupling Lithium Reutilization Behavior under Different Discharge Rates for Anode-Free Lithium Metal Batteries.

Shuo Zhang1,2, Chong Yan1,2, Ye Xiao1,2

  • 1School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China.

Advanced Materials (Deerfield Beach, Fla.)
|April 30, 2025
PubMed
Summary
This summary is machine-generated.

Anode-free lithium metal batteries (AFLMBs) show a "volcano-type" capacity retention at high discharge rates. Lowering concentration polarization by improving electrolyte performance enhances their optimal discharge rate and cycling stability.

Keywords:
anode‐freeconcentration polarizationfast dischargelithium metal batteriesrecoverable Li0

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Energy Storage

Background:

  • Anode-free lithium metal batteries (AFLMBs) offer high energy density and safety, making them suitable for electric vehicles and aircraft.
  • The performance limitations of AFLMBs at high discharge rates remain poorly understood.

Purpose of the Study:

  • To investigate the underlying mechanisms limiting the fast discharge performance of AFLMBs.
  • To propose strategies for overcoming these limitations and improving high-rate capabilities.

Main Methods:

  • Systematic investigation of AFLMB performance across varying discharge rates.
  • Analysis of lithium deposition morphology and concentration polarization.
  • Electrolyte modification to enhance ion transport.

Main Results:

  • A novel

Conclusions:

  • Concentration polarization is the rate-determining step for high-rate discharge in AFLMBs.
  • Optimizing electrolyte properties to reduce concentration polarization significantly improves discharge rate and cycling stability.
  • This research expands the operational boundaries of AFLMBs under demanding conditions.